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rpm27
rpm27
Last Activity: Mar 8 '23, 08:10 AM
Joined: Jan 7 '08
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  • rpm27
    started a topic How to initialize a static class variable
    in C

    How to initialize a static class variable

    Hey everyone,

    I am trying to declare a static class variable (not a 'primitive' variable, but from a class i wrote) inside a class

    However, I have tried several ways to initialize it and they all caused compilation errors:

    Code:
    #include "MyClass.cpp"

class A
{
static MyClass* m = new MyClass();

public void example()
{
m->doSomething();
}
    ...
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    • rpm27
      started a topic new MySQL account
      in MySQL

      new MySQL account

      Hey everyone,
      sorry for the newbie question, but after some problems with configuring mySQL, I was able to create a new user account. My question is, how can I remove the password from the root account? and what should I have done during the installation in order to access the root account without a password. Thank you.
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      • rpm27
        started a topic Eclipse problem
        in Java

        Eclipse problem

        Hi, I am using Eclipse as an IDE, however as I repeatedly run and test my code, my PC begins to slow down, my CPU usage reaches a constant 100%, and it becomes an impossible task to use Eclipse (even when I stop running and edit the code, the PC blocks). Does someone had this same problem? I usually assume that my code stops running and resources are released when the result is displayed in the console, or when I run into an error. Should I stop...
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        • rpm27
          replied to Creating a new JComponent
          in Java
          This thread seems to get annoying :-) Anyways I don't actually have time to test these solutions. When I'll try them, I'll post more questions . Thanks again...
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          • rpm27
            replied to Creating a new JComponent
            in Java
            But, what if it's not a circle? Maybe some irregular shape, or a silhouette? I know I'm testing you patience :-) but I'd like to put my question in another way. I'd like to create a new button, with a look and appearance that I specify. Anyways, I'll try to extend class JComponent, and use paintComponent( Graphic g) to specify how it looks like. Thank you....
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            • rpm27
              replied to Creating a new JComponent
              in Java
              I understood that (I've already written something similar), but when I create an event handler class which implements MouseListener, and I write a method mouseEntered(), how the program will know that the mouse entered this particular circle so I can change its state to Active?...
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              • rpm27
                replied to Creating a new JComponent
                in Java
                I didn't realize that my post wasn't clear enough. Here's what I had in mind.
                As a test before I stumbled upon this problem, I already created a class Circle with the following methods:
                Code:
                 void setColor(Color c)
void setSize(int x)
void setPosition(int x, int y)
void setActive(boolean b)
void draw(Graphics g)
                My original idea was to create a class which extends JPanel, and have as instance...
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                • rpm27
                  replied to Import declaration
                  in Java
                  Yes, right after writing this post, I convinced myself that import individual classes would help me as I'm a Java beginner. Thanks anyway. :-)
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                  • rpm27
                    started a topic Creating a new JComponent
                    in Java

                    Creating a new JComponent

                    Hey, I'm trying to create a small program which displays several circles across the screen. However, I intend for these circles to be clickable and change color, size... on different mouse events on each object. So in order for the Class circle to be added to a JPanel and to register events, it should extend the JComponent class. Of course not JComponent since it is abstract. So which one? JPanel, JLabel... Thank you.
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                    • rpm27
                      started a topic Import declaration
                      in Java

                      Import declaration

                      Hey, I have a small style question. Which import style is preferable (or better) to use. A single one like
                      Code:
                      import java.util.System;
                      or an import-on-demand like
                      Code:
                      import java.util.*;
                      ? Is there any advantage or disadvantage for each declaration? Thank you.
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                      • rpm27
                        replied to Timer
                        in Java
                        Thank you for your answers. the Timer seems to be the most interesting solution, I'll check the API documentation right away. Thanks again.
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                        • rpm27
                          started a topic Timer
                          in Java

                          Timer

                          Hi, I have written a solitaire game (a very small one) but I want to add a timer which will run while i'm playing and will give me the time spent on the game. I imagine it will need multithreading. I'm I right?
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                          • rpm27
                            started a topic Eclipse, NetBeans, Java Studio Creator
                            in Java

                            Eclipse, NetBeans, Java Studio Creator

                            Hi, I am in the process of learning Java. I have been using Eclipse to try some simple example code. However, I am thinking of trying NetBeans since it has a GUI editor. And last, in my Java book, the author recommends using Java Studio Creator 2 in order to build applications.

                            Could someone explain to me what is the difference between these three IDEs, and possibly which one us the best. Thank you
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                            • rpm27
                              started a topic JFrame and JPanel
                              in Java

                              JFrame and JPanel

                              I'm new to Java. I am starting to understand Java GUI dimension (the swing library), and I need someone to clarify something to me: As far as I know, JFrame objects provide a window (with the maximize, minimize, close buttons, and a title bar), and JPanel provide a space for graphics, however they both are containers and can contain other JComponents (Buttons...). My question is, in what case should I add my components directly to a JPanel object,...
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                              • rpm27
                                started a topic Softwares written in Java
                                in Java

                                Softwares written in Java

                                I was wondering what are some of the important softwares that are entirely or mostly written in Java. I heard that LimeWire is. Does someone know?
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                                • rpm27
                                  started a topic New to Java - What to download
                                  in Java

                                  New to Java - What to download

                                  I'm starting to learn Java (after I learned C++), however, as the different tutorials are telling me, I should download the JDK + an IDE (eg. Eclipse). Could someone tell me what these different components really do: JDK, JRE and IDE (I think an IDE is analogous to a compiler right?) Thank you
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                                  • rpm27
                                    started a topic Delaying the program
                                    in C

                                    Delaying the program

                                    Is there a way in C++ to delay the program (for example before it displays something or calls a function) by a certain amount of seconds? I know it it possible in JavaScript, but is it in C++? Thank you.
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                                    • rpm27
                                      replied to Getline problem
                                      in C
                                      Thank you. I'll do that. :-)
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                                      • rpm27
                                        replied to Getline problem
                                        in C
                                        I retried it again and it is giving me the same fault. I know that the code is too simple to have any hidden faults, so could it be from my OS or compiler?
                                        I am using Windows XP Home Edition SP2, and my compiler is Microsoft Visual C++ 6.0
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                                        • rpm27
                                          replied to Passing global variables
                                          in C
                                          I retried to declare them with global variables and it worked.
                                          I has to add the #if !defined statements.
                                          Thank you.
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